1 files changed, 67 insertions, 0 deletions
diff --git a/gcc/testsuite/gcc.dg/pr42388.c b/gcc/testsuite/gcc.dg/pr42388.c
new file mode 100644
index 000000000..ad97eb4d9
--- /dev/null
+++ b/gcc/testsuite/gcc.dg/pr42388.c
@@ -0,0 +1,67 @@
+/* { dg-do compile { target powerpc*-*-* ia64-*-* x86_64-*-* } } */
+/* { dg-options "-O2 -fselective-scheduling -fmodulo-sched" } */
+
+enum rtx_code
+{
+  INSN, ADDR_VEC, ADDR_DIFF_VEC, CALL_INSN, CODE_LABEL, BARRIER, NOTE
+};
+typedef union rtunion_def
+{
+  int rtint;
+  char *rtstr;
+  struct rtx_def *rtx;
+  struct rtvec_def *rtvec;
+}
+rtunion;
+typedef struct rtx_def
+{
+  unsigned short code;
+  rtunion fld[1];
+}
+ *rtx;
+typedef struct rtvec_def
+{
+  unsigned num_elem;
+  rtunion elem[1];
+}
+ *rtvec;
+extern rtx emit_barrier (void);
+extern rtx emit_note (char *);
+
+static void
+copy_loop_body (rtx *map)
+{
+  int i;
+  rtx insn, copy;
+  rtx pat = copy->fld[3].rtx;
+
+  switch (insn->code)
+    {
+    case INSN:
+      if (insn->fld[7].rtx)
+	{
+	}
+      else if (pat->code == ADDR_VEC || pat->code == ADDR_DIFF_VEC)
+	{
+	  int diff_vec_p = pat->code == ADDR_DIFF_VEC;
+	  int len = pat->fld[diff_vec_p].rtvec->num_elem;
+	  for (i = 0; i < len; i++)
+	    pat->fld[diff_vec_p].rtvec->elem[i].rtx->fld[5].rtint++;
+	}
+    case CALL_INSN:
+      for (i = 0; i < 64; i++)
+	map[i] = 0;
+    case CODE_LABEL:
+    case BARRIER:
+      copy = emit_barrier ();
+    case NOTE:
+      copy = emit_note ("x");
+    }
+}
+void
+unroll_loop (int insn_count, rtx *map)
+{
+  if (insn_count > 50)
+    copy_loop_body (map);
+}
+